Bosch Rexroth | 4WEH22HD7X6EW110N9TDA
4WEH22HD7X/6EW110N9TDA
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The 4WEH22HD7X/6EW110N9TDA valve is built by Bosch Rexroth for the WEH Directional Spool Valves series. It is an electro-hydraulic unit designed to route pressure in automated hydraulic circuits where directional control is required. The valve follows the ISO 4401-08-08-0-05 porting pattern and implements a 4-way flow path in size NG25 to fit common subplates. Two discrete spool positions are provided, identified by spool symbol D, so equipment can shift between only two flow states. The main spool is returned by hydraulic force rather than a spring, and a concealed manual override permits local actuation during commissioning or shutdown. Pilot oil is supplied externally through port X while the pilot return is internal to port T, reducing external hose runs and simplifying panel layouts.
The valve handles system lines at up to 350 bar on ports P, A, and B, while port T is rated for 250 bar, aligning with reservoir limitations. Pilot supply may rise to 210 bar but must not fall below 8 bar to secure reliable shifting of the main stage. A maximum flow of 450 L/min supports high-throughput actuators without excessive pressure drop. Mounting to the manifold block uses four M12 × 60 screws per ISO 4762-10.9, ensuring the interface can sustain the stated loads. The electro-hydraulic actuation combines these pressure and flow capacities with the defined pilot limits to deliver fast response under demanding duty cycles, completing the directional control function within industrial hydraulic automation systems.
Technical Specifications
Actuation
Electro-Hydraulic
Manual Override
Concealed
Max Operating Pressure (p, A, B)
350 bar
Max Operating Pressure (t)
250 bar
Max Pilot Pressure
210 bar
Maximum Flow
450 l/min
Min Pilot Pressure
8 bar
Mounting Screws
M12 x 60 (ISO 4762-10.9)
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-08-08-0-05
Spool Positions
2
Spool Return (main Valve)
Hydraulic
Spool Symbol
D
Valve Size
NG25
Way Configuration
4-Way
1620 Old Apex Road
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